Really great one today on OSL to LHR, BA767, by the inflight lead. She did the greetings to those of us down the back immediately following the CE meal service, was gracious and friendly without being obsequious, natural, and very generous with what was offered. I was parched and initially just asked for a cup of tea - she came back with tea, nuts, and a Do & Co Mousse - then I came to my senses and asked for a G&T which she went off and brought back. She was also very diligent in terms of offering refills.
I've been fortunate to have two excellent CSM/IFL in the last 8 days or so, one in CE and one in ET, and it really does make all the difference.